Funding for this research was provided by:
Natural Science Foundation of Jilin Province (20190201047JC)
Special Health Project of Jilin Province Department of Finance
Article History
Received: 18 November 2019
Accepted: 13 January 2020
First Online: 24 January 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Ethics Committee of The Second Hospital of Jilin University and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.